Pump-piston



PUMP( PISTON.

APPLICATION FlLED SEPT. 15, 1920.

A INVENTOR.

` www "n dATTORNEY.

' Application Med eptemher To alwlwm t my conce/m:

Be it known that I, MILES F. Youirn a eitizen'fof the United States, ieeiding et Sourlake, in the county of Hardin, Mnl tritate of Texas, have invented 'certain new and useful Improvements in Pump-Piraterie, of which thefollowing is a specification, refierence being had to the accompanying drawhis invention relates to pump pistons.

An importantfobjeet of the invention is to Eovide a pump piston wherein the pieton dfyproper is securely maintained against hi ting upon the piston rod. A-further object of the invention .is to lprovide in a pump piston, :1 piston body, the packin receiving groove of which 1e tapered gro thegfollowing end of the pieton `forwardly, thereby permitting the use oir' unit packing.

A further object of the invention is to provide a, device of the above (sinner-,ter of a compactend simple nature in order to minimize the labor oi repaeking the pump.

Other ob'ects and advantages; o i the invention Wil become apparent throughout the course of the following description.

Inthe drawings, wherein for the purpese of illustration Iis shown a 'preferred embbdivinent pf Vmy invention and wherein like refer ence chapcters designate like parte throughout.

igure 1 is` a transverse .sectional YView taken through a pum-p piston constructed in accordance with my invention, anni Big. 2jis a section taken on the line 2--2 y of i l.

` Re rring now more particularly .to the ravvings, the numeral l0 designates a pieton rod rovided adjacent ite end with :i te pareti) portion ll which is externally screw 40 threaded.` A piston l2 is provided having an axial bore 12! which is tapered similarly to the taper o the piston rod, which is provided with internal screw threads eo* acting with the` screw threade of the taper portion' l1 of the 'piston rofl; body 12v may-be brought into engagement With the piston rod by any suitable means, as, for example, by ineens of e key,7 wrench engaging in sockets l2@ formeei in the fol-- lowing end ofA-the piston. The folio-Wing end of the piston hasiorrned therein e recess 14 anglthe portion of the piston roti l0 which extends into. this reces@` and rear.--

Bpeciicetinn et* het:

T he pieten iii, itlfllii; 5L

ik 1 if ifi/emit ir ie etreel :it iii.

ie end ifi andi 30 Wliieoinplete y i 'llt ntei oee'iiete i ,zit l'sf, in a elfiouliier end ufftion in incre rearwardly to- Following enti oi' 'i iieton, 'torniingl :i mi ree portieri n ing between the weile olf the cylinder f.) the pieton tziipered rennen haring ite l.r wat enti iii" Dos-eti 'tenerti the foilowifn A L 70 ton. it iiiilewer n e W ing` .sin z with the roti l0. tewiee i si` .any be 75 to it to .xiii udineiiy upon the .rofl by r' een oi" ii f th eedevl engingeinentrl l li @teil a pre' ably meent: oi the mino iv A e ne thoee ployeil in roiimif'iioi'i wi pietim ,body i2, 30

in omleilimt :i 'f

U will be tion herein may he er' img/e tinnoue rin inviting' eiigrbtiy La' reeiontl te r oi" the rei the er ption, l

-fiereoii will en k ffii if "iee by reason n :mii the ease mined 1n opera- @ij/f weil etiiiptecl we meetic-id, anti that the @ein ruoeet forth eapnhl Sonie @im i L,hout epe 'trein e: Spirit of i intention l i ein 11G not limit myfseltnl to the construction as here- .nbefore set forth except as sol liniited by gaginr the screw threads thereof.

2, he combination with a piston rod provided adjacent its end with a tapered screw threaded portion ot a pistou provided with an axial tapered Screw threaded bore receiving the tapered-portion ot the rod and engaging the screw threads thereof, said pist0n having an axial counter bore inlnedin the outer end thereof, and a jain nilt having threaded engagement with the rod and engaging the piston within the counter bore.

3. The combination with a piston rod provided adjacent its end with a tapered screw threaded portion, of a piston provided with an axial tapered screw threaded bore receivingthe tapered portion of the rod and en gaging the screw threads thereof, said piston having an axial counter bore toi-ined in the Outer end thereof, the end ot' said rod being straight and provided with screw threads, said straight portion lying within the counter bore of said piston, a jam nut engaging the threads of said portion and abutting said piston within said eoilnter bore, a follower plate having,r threaded engagement with the straight portion of said rod and abutting,r said plston, and aojaln nut engaging said follower plate.

4. The conibination with a piston rod provided adjacent its end with a tapered screw threaded portion, ol a piston provided with an axial tapered screw threaded bore receiv-l ing the tapered portion of the rod and engaging the screw threads thereof, .said pis ton having an axial counter bore lformed in the outer end thereof, the end ol said yrod being straight and provided wilhi screw thralds, said straight portion lying:r within the counter bore oi' said piston, ajain nut engaging; the threads of said portionand .abutting said piston within said counter bore, a follower plate having threaded en MILES l". YOUN T. 

